Text Customization for Readability

Overview

Millions of people cannot read normally-formatted text, and millions more will not be able to in the coming years as their vision declines due to ageing. Many people with low vision, dyslexia, and related conditions and situations that impact reading cannot read the text in print books, newspapers, manuals, etc. (even with reading glasses). However they can read text that is formatted differently, for example, with larger letters, different font, more spacing, etc.

Electronic media (websites, PDF files, e-books) offers the opportunity for unprecedented access to information for people with print disabilities because accessibility barriers of print can be overcome through technology. With technology such as word processing software, electronic text can be customized (with larger font, etc.) to be readable by more people with visual perceptual impairments.

However, some mainstream technologies and tools do not provide sufficient text customization functionality to make text readable.

PDF files are of particular concern because:

Essential information —
such as tax instructions, scientific papers, educational material, and medical information — is often provided only as PDF.

PDF files are not sufficiently accessible to many people with low vision, dyslexia, and related conditions and situations that impact reading — because Adobe Reader and other PDF viewers currently lack sufficient text customization functionality. (See PDF support for text customization.)

Even well tagged PDF files that are more accessible to screen reader users
are not accessible to many people with other print disabilities.

If you read "accessible PDF" or hear anyone say "accessible PDF": Gently explain to them that PDF files are not sufficiently accessible to many people with print disabilities because PDF readers/viewers do not let them make the text readable, and point them to this web page and information on PDF support for text customization. (When people say "accessible PDF", they probably mean "tagged PDF", which is more accessible to screen reader users, but still not to many others.)

can influence user agent functionality, e.g, you're a product manager, designer, etc. of a user agent (web browser, PDF viewer, e-book reader): Include support in your product for users to be able to customize aspects of text display.

decide what technology to use to provide information: Provide the information in a format that is accessible with current "user agents" (browsers and readers).
PDF files are not currently accessible to people with low vision, dyslexia, and related conditions and situations that impact reading.

develop accessibility policies, standards, or guidelines: Ensure that they include requirements to meet users' needs to customize text for readability.

The TAdER Project

Note: Not W3C WAI

Please be careful in referencing the information on this tader.info website and e-mails from uiAccess.com as from the individual Shawn, not W3C or WAI. Although Shawn also works part-time for the W3C WAI, these are not W3C WAI publications.